Even on the clearest night, some stars cannot be seen by the naked eye because they are below the viewer's __________ threshold

Suppose you walk down an alley in a large city and see someone sleeping who appears to be homeless. You may wonder, "Why is this person homeless?" If you commit the fundamental attribution error, which of the following might be your answer?

What are alternative forms of the same gene called?

a. Alleles b. Chromosomes c. Gene markers d. Autosomes e. DNA